I have no idea what you mean by "php codings"
kSOAP is (AFAIK) just a lightweight SOAP implementation for java. It composites and decodes the requests as SOAP calls which can then be sent to a webservice which can be implemented in any language. From the webservice point of view, it doesn't really matter what the client is doing as long as it is talking SOAP.
There is a SOAP implementation as standard in recent builds of PHP. Which is well documented but if you've got an older version or for some reason it has not been included in your install (and you can't fix that) there is also a pure php implementation - nuSOAP